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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the reaction given below. What is correct about the missing substance `HCN + NO_(2) rarr ? NO + H_(2)O`A. It is pseudohalogenB. It is hydrogenC. It is chalcogenD. It is methane. |
| Answer» Correct Answer - A | |
| 2. |
`XeF_(6)` on reaction with quartz givesA. `XeOF_(4)`B. `XeF_(4)`C. `XeO_(3)`D. `XeO_(4)`. |
| Answer» Correct Answer - A | |
| 3. |
`underset((2 : 1 "ratio"))(Xe + F_(2)) overset(Ni//675 K)rarr Z` The compound Z in the above reaction isA. `XeF_(4)`B. `XeF_(4)`C. `XeO_(3)`D. `XeO_(4)`. |
| Answer» Correct Answer - B | |
| 4. |
First ever compound of a noble gas was prepared byA. RamsayB. BerzeliusC. CavandishD. Bartlett. |
| Answer» Correct Answer - D | |
| 5. |
The inert gases can be isolated and separated byA. Electrolysis of their compoundsB. Fractional distillation of liquid airC. Adsorption and desorption on charcoalD. Both (B) and (C ). |
| Answer» Correct Answer - D | |
| 6. |
The first noble gas compound prepared by Bartlett isA. `Xe^(+)[PtF_(6)]^(-)`B. `XeF_(4)`C. `XeF_(6)`D. `XeOF_(4)`. |
| Answer» Correct Answer - A | |
| 7. |
The noble gas He was discovered in the chromosphere of sun by________.A. RayleighB. RamsayC. E.E. DornD. Lockyer and Janseen. |
| Answer» Correct Answer - D | |
| 8. |
Which of the followng noble gases has the highest positive electron gain enthalpy ?A. HeliumB. KryptonC. ArgonD. Neon. |
| Answer» Correct Answer - D | |
| 9. |
Liquid flow from a higher to a level .Which of the following liquids can climb up the wall of the glass vessel in which it is placed ?A. MercuryB. Liquid `N_(2)`C. Liquid HeD. Water. |
| Answer» Correct Answer - C | |
| 10. |
Low chemical reactivity of the noble gases can be attributed to theirA. being non-metalsB. having high ionization energyC. being gasesD. found in nature in small amount. |
| Answer» Correct Answer - D | |
| 11. |
What is true about the oxoacids of halogens ?A. All of them are good reducing agentsB. All of them are monobasicC. They may be monobasic as well as polybasicD. They have general formula HXO. |
| Answer» Correct Answer - B | |
| 12. |
The noble gas which forms maximum number of compound isA. NeB. XeC. KrD. Rn. |
| Answer» Correct Answer - B | |
| 13. |
During etching of glass by hydrofloric acid, which chemical compound is formed ?A. `H_(2)SiF_(6)`B. `H_(2)SiO_(6)`C. `H_(2)F_(2)`D. `F_(2)O`. |
| Answer» Correct Answer - A | |
| 14. |
Which halogen forms interhalogen compound but does not form polyhalide ion ?A. FluorineB. BromineC. IodineD. All of these. |
| Answer» Correct Answer - A | |
| 15. |
Which of the following pair of acids are called super acids ?A. `HClO_(4) H_(2)SO_(4)`B. `SbF_(5)` and `HClO_(4)`C. `FSO_(3)H` and `ClSO_(3)H`D. `FSO_(3)H` and `SbF_(5)` |
| Answer» Correct Answer - D | |
| 16. |
Which of the following does not contain iodine ?A. Tincture iodineB. CalicheC. Sea weedsD. Carballite. |
| Answer» Correct Answer - D | |
| 17. |
Which of the following is know as anhydron ?A. Anhydrous `CaSO_(4)`B. Anhydrous `Mg(ClO_(4))_(2)`.C. Anhydrous `KHF_(2)`D. Anhydrous `CuSO_(4)`. |
| Answer» Correct Answer - B | |
| 18. |
Which among the following is solid or ordinary temperature ?A. `SiO_(2)`B. `CO_(2)`C. `NO_(2)`D. `SO_(2)`. |
| Answer» Correct Answer - A | |
| 19. |
Which of the following is called peral white ?A. `BiOCl`B. `SbOCl`C. `(NH_(4))_(2)CO_(3)`D. `CaOCl_(2)`. |
| Answer» Correct Answer - A | |
| 20. |
Bucky bale is the name associated withA. C 60B. Si 30C. S 8D. C 80. |
| Answer» Correct Answer - D | |
| 21. |
The compound is covalent in gaseous state but ionic in solid state is.A. `PCl_(5)`B. `CO_(2)`C. `H_(2)S`D. `SO_(3)`. |
| Answer» Correct Answer - A | |
| 22. |
Which of the following oxoacid of nitrogen smells like that of leaching powder ?A. `NHO_(3)`B. `NHO_(2)`C. `HNO_(4)`D. None of these. |
| Answer» Correct Answer - C | |
| 23. |
What type of orbitals are used by nitrogen in forming `NCl_(3)` ?A. 2p-orbitalsB. `sp^(2)` hybrid orbitalsC. `sp^(3)`-hybridD. sp-hybrid. |
| Answer» Correct Answer - C | |
| 24. |
Natural gas is the richest source ofA. HeliumB. NeonC. ArgonD. Xenon. |
| Answer» Correct Answer - A | |
| 25. |
Which is the most easily liquifiable rare gasA. ArB. NeC. XeD. Kr. |
| Answer» Correct Answer - C | |
| 26. |
The noble gas which is radioactive isA. ArgonB. HeliumC. RadonD. Xenon. |
| Answer» Correct Answer - C | |
| 27. |
When Al is added to hot solution of KOH ?A. Oxygen is evolvedB. Hydrogen is evolvedC. No reaction takes placeD. `Al(OH)_(3)` is formed. |
| Answer» Correct Answer - B | |
| 28. |
Anhydrous `AlCl_(3)` produces fumes in the air because ofA. OxidationB. ReductionC. HydrolysisD. Hydration. |
| Answer» Correct Answer - C | |
| 29. |
Which of the following represents the correct order of first ionization energies ?A. `Mg gt Al gt Na gt B`B. `B gt Al gt Mg gt Na`C. `B gt Mg gt Al gt Na`D. `Mg gt B gt al gt Na`. |
| Answer» Correct Answer - C | |
| 30. |
Which of the following compounds is/are not soluble in water?A. `LiCO_(3)`B. LiFC. `Li_(3)PO_(4)`D. All of these. |
| Answer» Correct Answer - D | |
| 31. |
Gun shots are made of lead with a little of arsenic. The function of As is to increaseA. RangeB. PowerC. BrittlenessD. Strength. |
| Answer» Correct Answer - C | |
| 32. |
Which of the following represents the correct order the basic strength ?A. LiOH `gt` NaOH `gt` KOH `gt` PbOHB. PbOH `gt` NaOH `gt` KOH `gt` LiOHC. PbOH `gt` KOH `gt` NaOH `gt` LiOHD. LiOH `gt` PbOH `gt` KOH `gt` NaOH. |
| Answer» Correct Answer - C | |
| 33. |
Which of the following compounds has the highest melting pointA. LiClB. NaClC. KClD. SCl. |
| Answer» Correct Answer - B | |
| 34. |
Which of the following has `SP^(3)` hybridization ?A. `XeO_(3)`B. `BCl_(3)`C. `XeF_(4)`D. `BBr_(3)`. |
| Answer» Correct Answer - A | |
| 35. |
Which of the following metals has the highest melting point ?A. LiB. BeC. NaD. Mg. |
| Answer» Correct Answer - B | |
| 36. |
The carbide of which of the following metals on hydrolysis give AllyleneA. BeB. CaC. AlD. Mg. |
| Answer» Correct Answer - D | |
| 37. |
`XeF_(2)` molecule isA. PyramidalB. Square planarC. LinearD. Triangular. |
| Answer» Correct Answer - C | |
| 38. |
Which of the following is a planar molecule ?A. `XeO_(4)`B. `XeF_(4)`C. `XeOF_(4)`D. `XeO_(2)F_(2)`. |
| Answer» Correct Answer - B | |
| 39. |
What kind of metals can form superoxides?A. LiB. NaC. MgD. K. |
| Answer» Correct Answer - D | |
| 40. |
Which of the compound is stable to heat ?A. `Li_(2)CO_(3)`B. `Mg_(2)CO_(3)`C. Both of theseD. None of these. |
| Answer» Correct Answer - D | |
| 41. |
How many O-H bonds are present in `H_(2)SO_(4)` molecule ?A. TwoB. ThreeC. OneD. Four. |
| Answer» Correct Answer - A | |
| 42. |
Brimstone is another name for:A. CarnalliteB. BromocarnalliteC. SulphurD. Phosphate rocks. |
| Answer» Correct Answer - C | |
| 43. |
Which hydride of chalcogens is non-volatile, non-poisonous and odourless ?A. `H_(2)Te`B. `H_(2)S`C. `H_(2)O`D. `H_(2)O_(2)`. |
| Answer» Correct Answer - C | |
| 44. |
Among the following the most stable hydride isA. NaHB. LiHC. KHD. RbH. |
| Answer» Correct Answer - B | |
| 45. |
Swarts reagent isA. `TiCl_(4)+R_(3)Al`B. `SbF_(3)`C. `FSO_(3)H`D. `H_(2)S_(2)O_(8)` |
| Answer» Correct Answer - B | |
| 46. |
An oxy acid of phosphorus has the following properties. Complete neutralization of the acid with sodium hydroxide solution gives an aqueous solution of sodium ions and oxy acid anions in the ratio 2 : 1. When a solution of acid is warmed with silver nitrate solution metallic silver is deposited. pH of 0.01 M solution of the sodium salt of this acid formed (assume `pK_(a) = 2x`) isA. `6 + 2x`B. `6 - 2x`C. `6 - x`D. `6 + x`. |
| Answer» Correct Answer - D | |
| 47. |
An oxy acid of phosphorus has the following properties. Complete neutralization of the acid with sodium hydroxide solution gives an aqueous solution of sodium ions and oxy acid anions in the ratio 2 : 1. When a solution of acid is warmed with silver nitrate solution metallic silver is deposited. The oxy acid is converted into - on reaction with acetic anhydrideA. `(CH_(3)CO)_(2)HPO_(4)`B. `(CH_(3)CO)_(2)HPO_(3)`C. `P_(2)O_(3)`D. `P_(2)O_(5)`. |
| Answer» Correct Answer - C | |
| 48. |
An oxy acid of phosphorus has the following properties. Complete neutralization of the acid with sodium hydroxide solution gives an aqueous solution of sodium ions and oxy acid anions in the ratio 2 : 1. When a solution of acid is warmed with silver nitrate solution metallic silver is deposited. What is the structure of the oxy acid ? A. IB. IIC. IIID. IV. |
| Answer» Correct Answer - B | |
| 49. |
The molecular shapes of diborane is shown below : . Select correct statement about `B_(2)H_(6)` :A. Bridging group are electron deficient with 12 valence electronsB. It has 2c-2e B-H bondsC. It has 3c-2e B-H-B bondsD. All the above and correct statements. |
| Answer» Correct Answer - D | |
| 50. |
Which of the following statements is not true about `B_(2)H_(6)` ?A. All the atoms in it lie in the same planeB. It does not contain any B-B bondC. It contains two types of B-H bondsD. It contains two types of B-H bonds |
| Answer» Correct Answer - A | |